J Korean Neurosurg Soc.  2007 Jun;41(6):421-424.

Bilateral Cortical Blindness Caused by Tentorial Herniation due to Brain Tumor

• Jeon JH
• Hwang HS
• Moon SM
• Choi SK

Abstract

Two patients, one with glioblastoma multiforme (GM) in the right thalamus and the other with meningioma at the right frontal convexity, had suffered bilateral cortical blindness after transtentorial herniation. On one of those patients, bilateral cortical blindness had occurred due to acute obstructive hydrocephalus caused by GM and on the other patient, cortical blindness had developed after acute hemorrhage from meningioma. Bilateral occipital lobes of those patients showed signal change on the brain magnetic resonance image (MRI). There were no ophthalmologic abnormalities on fundoscopy and ophthalmologic examination. After recovery of consciousness, cortical blindness was detected in both patients, and during gradual recovery period, visual function was slowly recovered. The pattern of visual evoked potential (VEP) at 7 weeks and 12 weeks after herniation was normalized gradually. Cortical blindness due to herniation was reversible, even though the high signals of bilateral visual cortex still existed on MRI 16 months later in case 2.

Keyword

Bilateral; Cortical blindness; Brain herniation; Brain tumor

MeSH Terms

Blindness, Cortical*
Brain Neoplasms*
Brain*
Consciousness
Evoked Potentials, Visual
Glioblastoma
Hemorrhage
Humans
Hydrocephalus
Magnetic Resonance Imaging
Meningioma
Occipital Lobe
Thalamus
Visual Cortex